Discover, Develop, Operate


  • open pit copper/gold mine
  • mill processes approx. 16,800 tonnes per day
  • commenced operations 1997
  • current mine life to 2026
  • concentrate trucked to Port of Vancouver
  • mine operations suspended Aug 4, 2014 due to TSF breach
  • modified mine operations restarted Aug 5, 2015
  • mine received authorizations on June 23, 2016 to return to normal operations
  • approval of long-term water management plan received April 7, 2017

On January 7, 2019, the Company announced Mount Polley mine operations would be suspended in May 2019 due to declining copper prices. Imperial anticipates a resumption of operations once the economics of mining at Mount Polley improve.

The ongoing environmental monitoring and remediation programs in the areas affected by the 2014 breach will not be impacted by the mine’s closure. Extensive remediation work has been achieved during the past five years. In 2018, trout were successfully reintroduced into the remediated upper section of Hazeltine Creek. All excess site water is being treated, and discharged via waterline from the water treatment plant to diffusers deep in Quesnel Lake.

During Spring 2018, a four hole diamond drill program was completed totalling 953.12 metres. The holes were drilled in the Saddle area between the Springer and Cariboo pits to confirm mineralization in this area for future mining plans. This information has been incorporated into the mine’s block model.

An exploration program has been designed to target the mineralization underneath the Saddle zone, separating the Cariboo and Springer Phase 6 pits. This represents an ideal opportunity to find additional low stripping ratio reserves for when mine operations re-start. This exploration is planned following suspension of mine operations.

A program of ground magnetometer surveying, started in 2018, will continue in 2019 in conjunction with targeted areas of soil sampling, prospecting and geological mapping. Future additional diamond drilling of targets in the vicinity of the Springer pit is also planned. The set exploration targets have been identified by a combination of soil sampling and geophysical surveys.

Mount Polley is an open pit copper/gold mine with an underground component located in south-central British Columbia, 56 kilometres northeast of Williams Lake. The property encompasses 20,113 hectares, comprised of seven mining leases totalling 2,007 hectares, and 46 mineral claims encompassing 18,106 hectares. Mount Polley mine is owned and operated by Mount Polley Mining Corporation (MPMC), a subsidiary of Imperial.


Milling of low grade stockpiles are targeted to extend operations to the end of May 2019.


YE 2018 YE 2017 YE 2016
Copper - 000’s pounds 14,973 19,071 25,339
Gold - ounces 37,120 48,009 46,444

For additional information, refer to the Company’s New Releases, Quarter Reports & Annual Information Form.

Update Apr | 2019